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<?php var_dump(new DateTime("first day of month"));
Output for 7.0.0 - 7.2.0
Fatal error: Uncaught Exception: DateTime::__construct(): Failed to parse time string (first day of month) at position 13 (m): The timezone could not be found in the database in /in/iYQR6:3 Stack trace: #0 /in/iYQR6(3): DateTime->__construct('first day of mo...') #1 {main} thrown in /in/iYQR6 on line 3
Process exited with code 255.
Output for 5.5.0 - 5.6.28
Fatal error: Uncaught exception 'Exception' with message 'DateTime::__construct(): Failed to parse time string (first day of month) at position 13 (m): The timezone could not be found in the database' in /in/iYQR6:3 Stack trace: #0 /in/iYQR6(3): DateTime->__construct('first day of mo...') #1 {main} thrown in /in/iYQR6 on line 3
Process exited with code 255.